How can I make my cocoalibspotify app for iOS respond to the built-in pause/play and next/previous controls? I see no documentation of this.
In the main view controller, the app needs to subscribe to remote control events.
- (void)viewDidLoad {
// ...
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
// ...
}
Remote control button presses will then trigger remoteControlReceivedEvent: on your view controller. The event can be handled as follows.
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlPause:
// Handle pause
break;
case UIEventSubtypeRemoteControlPlay:
// Handle play
break;
case UIEventSubtypeRemoteControlPreviousTrack:
// Handle Previous
break;
case UIEventSubtypeRemoteControlNextTrack:
// Handle Next
break;
default:
break;
}
}
}
Related
I have an audio app that plays background audio on iOS devices. I need to have the app have the "skip 15" buttons — a la the Apple Podcasts app and Overcast — instead of next/previous track buttons. Does anyone know where the documentation to this is, or of some examples? This is turning out to be a tricky issue to Google.
Update: Great answer to this question for iOS 7.1 and later at https://stackoverflow.com/a/24818340/1469259.
The buttons on the lock screen trigger "remote control" events. You can handle these events and skip forward/back as you require:
- (void)viewDidAppear:(BOOL)animated {
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
if ([self canBecomeFirstResponder]) {
[self becomeFirstResponder];
}
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {
if (receivedEvent.type == UIEventTypeRemoteControl) {
switch (receivedEvent.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
// add code here to play/pause audio
break;
case UIEventSubtypeRemoteControlPreviousTrack:
// add code here to skip back 15 seconds
break;
case UIEventSubtypeRemoteControlNextTrack:
// add code here to skip forward 15 seconds
break;
default:
break;
}
}
}
How you do the actual skipping depends on how you're playing the audio.
Documentation here https://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS/Remote-ControlEvents/Remote-ControlEvents.html
Potentially another way of achieving this, but not one I've used myself is MPSkipIntervalCommand https://developer.apple.com/library/ios/documentation/MediaPlayer/Reference/MPSkipIntervalCommand_Ref/index.html
i tried to look for it for days in google and i couldn't find an answer.
i have an app that play audio stream from the internet and i use MPNowPlayingInfoCenter to display the artist title, song title and artwork. now my question is how to use the play/pause button in the MPNowPlayingInfoCenter to play or stop my audio stream.
For this you have to handle remote control Events --
//Add these lines in viewDidAppear()
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
//Add these lines in viewWillDisappear()
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
Then Use
-(void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent
{
NSLog(#"received event!");
if (receivedEvent.type == UIEventTypeRemoteControl)
{
switch (receivedEvent.subtype)
{
case UIEventSubtypeRemoteControlPlay:
// play the video
break;
case UIEventSubtypeRemoteControlPause:
// pause the video
break;
case UIEventSubtypeRemoteControlNextTrack:
// to change the video
break;
case UIEventSubtypeRemoteControlPreviousTrack:
// to play the privious video
break;
default:
break;
}
}
}
I have an application that plays music and want to use lockscreen control (play/pause).
With NSLog I can see that my app get's the button trigger but not theUIEventSubtypeRemoteControlTogglePlayPause.
Here's a bit of my code:
- (void)viewDidLoad {
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent
{
NSLog(#"REMOTE RECEIVE");
if (receivedEvent.type == UIEventTypeRemoteControl)
{
NSLog(#"received remote event");
switch (receivedEvent.subtype)
{
case UIEventSubtypeRemoteControlTogglePlayPause:
NSLog(#"toggle button received");
//[self togglePlayPauseTapped: nil];
break;
default:
break;
}
}
I get "REMOTE RECEIVE" and "received remote event" from the NSLog Output but not the line inside ...TogglePlayPause.
Any ideas?
use the case
UIEventSubtypeRemoteControlPause
UIEventSubtypeRemoteControlPlay
for iOS 7
The accepted answer is not clear.
UIEventSubtypeRemoteControlPlay, UIEventSubtypeRemoteControlPause and UIEventSubtypeRemoteControlStop are called within the user interaction.
UIEventSubtypeRemoteControlTogglePlayPause is called within headset interaction.
This is a similar question to this. But I still can't quite figure out what to do.
So, I have a tabbar app that functions similar to an ipod. One view controller is the "NOW PLAYING" view controller and it is the view controller at index 1. So, in that VC I have:
- (void)viewDidAppear:(BOOL)animated
{
// Turn on remote control event delivery
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
// Set itself as the first responder
[self becomeFirstResponder];
}
- (BOOL)canBecomeFirstResponder
{
return YES;
}
- (void)remoteControlReceivedWithEvent:(UIEvent *)event
{
NSLog(#"Where is my event?");
if(event.type == UIEventTypeRemoteControl)
{
switch (event.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
NSLog(#"Pause");
break;
case UIEventSubtypeRemoteControlNextTrack:
NSLog(#"Next");
break;
case UIEventSubtypeRemoteControlPreviousTrack:
NSLog(#"Prev");
break;
default:
NSLog(#"SOMETHING WAS CLICKED");
break;
}
}
}
I don't receive any events on remote clicks either on the headphones or on the double-home button click shortcuts. I am running on an actual iPhone, not in the simulator. I am using a AVQueuePlayer (which IS playing) to manage my media.
I just shoved everything into the AppDelegate and told the AppDelegate to call to the ViewController to tell it what to do and it worked fine. Is it poor practise to put it in the AppDelegate?
In the view controller for my audio player I've added this:
- (void) viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
}
- (void) viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[UIApplication sharedApplication] endReceivingRemoteControlEvents];
[self resignFirstResponder];
}
- (BOOL)canBecomeFirstResponder {
return YES;
}
This switches the icon in the player controls from the iPod icon to my own app, it also puts the little playback icon in the status bar.
Next I added this to my view controller to handle the remote events:
- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
NSLog(#"REMOTE EVENT!");
switch (event.subtype) {
case UIEventSubtypeRemoteControlTogglePlayPause:
[streamer pause];
break;
case UIEventSubtypeRemoteControlPlay:
[streamer start];
break;
case UIEventSubtypeRemoteControlPause:
[streamer pause];
break;
case UIEventSubtypeRemoteControlStop:
[streamer stop];
break;
default:
break;
}
}
However, this is never called. I tried bringing up the playback controls while the app was running, I tried going back to my home screen and tapping some playback controls, and I tried my earbuds' controls. All had no luck.
Does anyone have any pointers as to where I can be going wrong?
Thanks.
You have implemented the wrong method: instead of - (void) viewWillAppear:(BOOL)animated it should have been - (void)viewDidAppear:(BOOL)animated.
I ran into this problem before and discovered that in my problem it was because my view was a subview and the parent was catching the remote events. I would start in the AppDelegate and implement the method and see if anything is being sent to the AppDelegate and then trace it down from there. Chances are there is a view or viewController that is catching the event and not passing it along.
Have you made sure to set your audio session? Use AVAudioSession and set the category to AVAudioSessionCategoryPlayback before becoming first responder.